Toilet tank



FIG. 1 is a front elevational view of the toilet tank showing my newdesign.

FIG. 2 is a top plan view thereof.

FIG. 3 is a left side view thereof.

FIG. 4 is a right side view thereof.

FIG. 5 is a bottom plan view thereof.

FIG. 6 is a rear elevation view thereof.

The ornamental design for toilet tank, as shown.